JP2010226870A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator having a structure which can improve assembly performance of a stator, while improving seal performance of a cooling jacket. <P>SOLUTION: Recesses 201b, which receive projections 212 of a splicing member 210, are provided at end surfaces of an inner diameter seal cover 201. By employing a butting structure in which the depth of the recesses 201b is structured to be deeper than the length of the projections 212, a dimensional error that occurs in the inner diameter seal cover 201 and expansion or contraction by heat can be absorbed by a fitting distance between the projections 212 and the recesses 201b. Furthermore, because it is a coupling structure by fitting the recesses to projections, liquid tightness can be increased and leakage from a butting part of cooling oil are can be prevented. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a stator having a cooling structure used for a motor or a generator.

  A motor or generator mounted on a vehicle such as an automobile has a rotor (rotor) and a stator (stator) arranged in an annular shape around the rotor. In the case of a motor, a rotational force is obtained by energizing the stator, and in the case of a generator, a current is obtained by the rotation of the rotor.

  The stator has an annular stator core having stator windings. The stator core is resin-sealed, and the resin-sealed stator core is housed in a case called a cooling jacket.

  When a current flows through the stator winding during the rotation of the rotor, the stator winding and the stator core generate heat. In recent years, it has been desired to increase the current density because of demands for miniaturization and cost reduction of motors. When the current density is increased, the stator winding and the stator core generate heat. In order to avoid the functional loss of the motor and the generator, it is important to suppress the temperature rise of the stator.

  Patent Documents 1 to 5 below disclose a stator including a cooling structure that supplies cooling oil for suppressing temperature rise. Patent Document 1 discloses a configuration in which a coil end of a stator core is surrounded by a cooling jacket. In addition, a structure is disclosed in which the slot opening of the stator core is closed with resin to suppress leakage of cooling oil supplied into the cooling jacket to the rotor side.

  Patent Document 2 discloses a structure in which a coil end is covered with a cooling jacket. A structure is disclosed in which leakage of cooling oil supplied into the cooling jacket to the rotor side is suppressed by an arc-shaped adapter inserted into an opening of a slot provided in the stator core.

  Patent Document 3 discloses a structure in which a coil end is covered with a cooling jacket. The structure which suppresses the leakage to the rotor side of the cooling oil supplied in the cooling jacket by providing a partition cover between a rotor and a coil end is disclosed.

  Patent Document 4 discloses a structure in which a coil end is covered with a cooling jacket (coil end cover). A structure is disclosed in which the coil end cover is in contact with the stator via an O-ring to suppress leakage of cooling oil supplied into the cooling jacket to the rotor side.

  Patent Document 5 discloses a structure in which a coil end is covered with a cooling jacket (coil end cover). A structure that suppresses leakage of cooling oil to the rotor side by closing a slit opening on the inner periphery of the stator core with resin or the like is disclosed.

JP 2005-323416 A JP 2006-271150 A JP 2003-143810 A Special table 2004-019468 gazette JP 2005-348594 A

  In any of the above-described stators, importance is attached to prevention of leakage (sealability) of the cooling oil supplied into the cooling jacket to the rotor side. Therefore, in order to improve the sealing performance of the cooling jacket, the number of parts is increased and the structure is complicated. Further, with the increase in the number of parts, an improvement in the assembly performance of the stator has been required.

  An object of the present invention is to solve the above-described problems, and provides a stator having a structure that can improve the assembly performance of the stator while improving the sealing performance of the cooling jacket. There is.

  In the stator according to the present invention, an annular stator core, an annular outer cover disposed on the outer peripheral surface side of the stator core, an annular inner cover disposed on the inner peripheral surface side of the stator core, and An annular first coil end cover that closes an open portion formed by the outer cover and the inner cover on one end side in the central axis direction of the stator core, and the outer cover on the other end side in the central axis direction of the stator core. And an annular second coil end cover that closes an open portion formed by the inner cover.

  The inner cover has an inner diameter seal cover that is in close contact with the inner peripheral surface of the stator core and is surrounded by the stator core. A seaming member is disposed on a circumferential end surface of the inner diameter seal cover. The

  In another form of the stator, the stator core has a plurality of divided stator cores arranged in an annular shape, and the inner diameter seal cover has a fitting hole for receiving a distal end portion in the radial direction of the divided stator core, It is provided along the circumferential direction.

  In another aspect of the stator, the split stator core includes a laminated core in which plates are laminated, a resin member that surrounds the laminated core, and a coil member that is disposed outside the resin member. . Further, the resin member is an insulator that is resin-molded so as to have a cylindrical portion that surrounds the divided stator core.

  In another form of the stator, the opening end portion of the fitting hole provided in the inner diameter seal cover and the end portion of the tubular portion of the insulator abut, and the opening end portion of the fitting hole, An inclined surface that overlaps each other is provided at the end of the cylindrical portion.

  In another form of the stator, a convex portion is provided on a joint surface of the joint member with a joint end surface of the inner diameter seal cover, and the convex portion is received on an end surface of the inner diameter seal cover. A concave portion is provided, and the depth of the concave portion is deeper than the length of the convex portion.

  In another form of the stator, the end portion of the outer cover, the end portion of the first coil end cover, and the end portion of the second coil end cover are arranged at the butted portion of the first coil end cover. A plurality of first engagement areas for locking the second coil end cover to the outer cover are provided.

  In another form of the stator, the end portion of the inner cover and the end portion of the first coil end cover and the end portion of the second coil end cover are provided at one of the ends. A second engagement region that accommodates the projected portion in a recessed portion provided on the other side is provided on the entire circumference.

  In another form of the stator, when the central axis direction of the stator core is arranged in the horizontal direction, the stator is supplied with the refrigerant closed by the first coil end cover and the second coil end cover. A refrigerant supply port for supplying a refrigerant to the space and a refrigerant discharge port for discharging the refrigerant from the refrigerant supply space are provided above the central axis, and the splicing member is arranged to be positioned above the central axis. Yes.

  In another aspect of the stator, the stator includes a refrigerant supply port that supplies a refrigerant to a refrigerant supply space closed by the first coil end cover, the second coil end cover, and a refrigerant supply space. A refrigerant discharge port for discharging the refrigerant is provided, and the splicing member is provided in a region substantially opposed to the refrigerant supply port with a central axis interposed therebetween.

  In another form of the stator, the central axis direction of the stator core is arranged in the horizontal direction.

  According to the stator based on this invention, it is possible to improve the assembly performance of the stator while improving the sealing performance of the cooling jacket.

It is a perspective view which shows the external appearance structure of the stator in embodiment. It is a fragmentary sectional perspective view which shows the internal structure of the stator in embodiment. It is a top view which shows the structure of the stator core in embodiment. It is an expanded sectional view which shows the state before matching of the butt | matching part of the internal diameter seal cover in embodiment, and is a figure equivalent to the IV-IV line | wire arrow cross-sectional position in FIG. It is a 1st expanded sectional view showing the state after butting of the butting part of the butting part of the inside diameter seal cover in an embodiment. It is a 2nd expanded sectional view which shows the state after matching of the butting part of the butting part of the internal diameter seal cover in embodiment. It is a 1st sectional view which intersects the axis of rotation of the motor generator in an embodiment. It is a 2nd sectional view which intersects the axis of rotation of the motor generator in an embodiment. It is a disassembled perspective view which shows the structure of the division | segmentation stator core which comprises the stator core in embodiment. It is a 1st partial expanded sectional view showing the relation between the division stator core and the internal-diameter seal cover in an embodiment. It is a 2nd partial expanded sectional view which shows the relationship between the division | segmentation stator core in embodiment, and an internal diameter seal cover. It is sectional drawing which shows the structure of the butt | matching part of the edge part of the inner side cover in the embodiment, the edge part of an outer side cover, and the edge part of a 1st coil end cover.

  A stator according to an embodiment of the present invention will be described below with reference to the drawings. Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. The same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

(Configuration of stator 1)
First, the stator 1 in the embodiment will be described with reference to FIGS. 1 to 3. The stator 1 has an annular shape, and an annular stator core 500 shown in FIG. 3 is accommodated therein. An annular outer cover 100 is disposed on the outer peripheral surface side of the stator core 500, and an annular inner cover 200 is disposed on the inner peripheral surface side of the stator core 500.

  On one end side (upper side in FIGS. 1 and 2) of the stator core 500 in the direction of the central axis A1 (rotation center of the rotor), an annular first coil end that closes an open portion formed by the outer cover 100 and the inner cover 200. A cover 300 is provided.

  On the other end side (lower side in FIGS. 1 and 2) of the stator core 500 in the direction of the central axis A1 (rotor center of the rotor), an annular second coil that closes the opening portion formed by the outer cover 100 and the inner cover 200. An end cover 400 is provided. The first coil end cover 300 and the second coil end cover 400 have a substantially C-shaped cross section. In FIG. 2, the upper and lower ends of the stator core 500 are sealed with resin, but the resin is not shown.

  The first coil end cover 300, the second coil end cover 400, and the outer cover 100 have a butted portion at which the first coil end cover 300 and the second coil end cover 400 are locked to the outer cover 100. A plurality of engagement regions F1 are provided in the circumferential direction. The detailed structure will be described later.

  In the butted portion between the first coil end cover 300 and the second coil end cover 400 and the inner cover 200, a convex portion provided in the inner cover 200 is accommodated in a concave portion provided in the end covers 300 and 400. An engagement region F2 is provided on the entire circumference. The detailed structure will be described later.

  The outer cover 100, the inner cover 200, the first coil end cover 300, and the second coil end cover 400 described above form a cooling jacket that accommodates the annular stator core 500.

  The stator core 500 accommodated inside has a plurality of divided stator cores 501 arranged in an annular shape. The plurality of split stator cores 501 are arranged on the inner peripheral surface of the outer cover 100 in a state where the inner diameter of the outer cover 100 is expanded by heating, and then the outer cover 100 is cooled, A plurality of split stator cores 501 are fastened (caulked) by the outer cover 100. As described above, when the split stator core 501 is adopted, the outer cover 100 has a function of fixing the split stator core 501.

(Sealing structure of inner diameter seal cover 201)
Next, with reference to FIG. 4 to FIG. 6, the joining structure at the joining end surface in the circumferential direction of the inner diameter seal cover 201 will be described. The inner cover 200 is in close contact with the inner peripheral surface of the stator core 500, and an inner diameter seal cover 201 surrounded by the stator core 500, and a seaming member 210 is disposed on a circumferential end surface of the inner diameter seal cover 201. ing.

  As shown in FIG. 4, the seaming member 210 is thinner than the body portion 211 and the body portion 211 extending from both ends of the body portion 211 to both sides in a cross-sectional view orthogonal to the central axis A <b> 1. A convex portion 212 is provided. In addition, on both end faces of the inner diameter seal cover 201, there are provided recesses 201b for receiving the protrusions 212 provided on the splicing member 210.

  FIG. 5 shows a state in which the inner diameter seal cover 201 is rolled into an annular shape and both end portions of the inner diameter seal cover 201 are connected using the joining member 210. The depth (L1) of the recess 201b is provided deeper (L1> L2) than the length (L2) of the projection 212. As a result, as shown in FIG. 5, all of the convex portions 212 can be accommodated in the concave portions 201b.

  In addition, as shown in FIG. 6, it is possible to joint the both ends of the inner diameter seal cover 201 by providing a gap S between both ends of the inner diameter seal cover 201 and the body portion 211 of the splicing member 210. It is.

  In this way, the end face of the inner diameter seal cover 201 is provided with the concave portion 201b that receives the convex portion 212 of the joining member 210, and the depth of the concave portion 201b is deeper than the length of the convex portion 212. By adopting it, it is possible to absorb dimensional errors generated in the inner diameter seal cover 201 and expansion / contraction due to heat by the fitting distance between the convex portion 212 and the concave portion 201b. Moreover, since it is the connection structure by the fitting of a recessed part and a convex part, liquid-tightness is improved and it also becomes possible to prevent the leakage from the butt | matching part of cooling oil.

  In the present embodiment, the joint member 210 is provided with the convex portion 212 and the inner surface seal cover 201 is provided with the concave portion 201b. However, the joint member 210 is provided with the concave portion and the inner surface seal cover 201 has an end surface. It is also possible to adopt a configuration in which a convex portion is provided on the surface. Further, a convex portion is provided on one end surface of the joining member 210, a concave portion is provided on the end surface of the inner diameter seal cover 201 facing, a concave portion is provided on the other end surface of the joint member 210, and a convex portion is provided on the end surface of the inner diameter seal cover 201 facing each other. It is also possible to employ a configuration that is provided.

(Arrangement position of the joining member 210)
Next, the arrangement position of the joining member 210 will be described with reference to FIGS. First, the first arrangement position of the splicing member 210 will be described with reference to FIG. FIG. 7 is a cross-sectional view orthogonal to the central axis A1 when the direction of the central axis A1 (rotation center of the rotor 600) of the stator core 500 is arranged in the horizontal direction.

  In order to supply and discharge the cooling oil as the refrigerant to the cooling oil supply space R as the refrigerant supply space closed by the first coil end cover 300 and the second coil end cover 400, the first coil end cover 300 and the first coil end cover 300 One or both end covers of the two-coil end cover 400 are provided with a cooling oil supply port S1 and a cooling oil discharge port S2 for discharging the cooling oil from the refrigerant supply space R to the outside. .

  In FIG. 7, the cooling oil supply port S1 and the cooling oil discharge port S2 are provided at a position above the center axis A1, and the joining member 210 is also provided at a position above the center axis A1. When the cooling oil supply port S1 and the cooling oil discharge port S2 are located above the central axis A1, the cooling oil is likely to accumulate in the lower region X, and the pressure of the cooling oil in this region X increases. It is possible.

  In the case where the joining member 210 is provided at the lower position at the position where the cooling oil supply port S1 and the cooling oil discharge port S2 are disposed, there is a gap between the joining member 210 and the end face of the inner diameter seal cover 201. If this occurs, the cooling oil may leak outside through this gap. Therefore, by disposing the joining member 210 above the central axis A1, it is possible to prevent the cooling oil from leaking from the generated gap.

  Next, the second arrangement position of the splicing member 210 will be described with reference to FIG. FIG. 8 is a cross-sectional view orthogonal to the central axis A1 when the direction of the central axis A1 (rotation center of the rotor 600) of the stator core 500 is arranged in the horizontal direction, as in FIG.

  One of the first coil end cover 300 and the second coil end cover 400 is used to supply and discharge the cooling oil to and from the cooling oil supply space R closed by the first coil end cover 300 and the second coil end cover 400. One or both of the end covers has a cooling oil supply port S1 and a cooling oil discharge port S2 for discharging the cooling oil from the refrigerant supply space R to the outside.

  In FIG. 8, the cooling oil supply port S1 is provided above the central axis A1, and the cooling oil discharge port S2 is provided below the central axis A1. The joining member 210 is provided below the central axis A1, which is a region facing the cooling oil supply port S1 across the central axis A1. When the cooling oil supply port S1 is provided on the upper side and the cooling oil discharge port S2 is provided on the lower side, the cooling oil may collide directly with the inner diameter seal cover 201 (region Y) from the cooling oil supply port S1. Conceivable.

  When the joining member 210 is provided at the upper position, in the unlikely event that a gap is generated between the joining member 210 and the end face of the inner diameter seal cover 201, the cooling oil may leak to the outside from this gap. . Therefore, by providing the joining member 210 below the central axis A1, which is a region facing the cooling oil supply port S1 across the central axis A1, it is possible to prevent leakage of the cooling oil from the generated gap. Can be prevented. Thus, by providing the joint member 210 in the region facing the cooling oil supply port S1 across the central axis A1, leakage of the cooling oil from the generated gap can be prevented in advance. . The state in which the cooling oil directly collides with the inner diameter seal cover 201 from the cooling oil supply port S1 is not limited to the case where the joining member 210 is provided at the upper position.

(Relationship between inner diameter seal cover 201 and stator core 500)
Next, the relationship between the inner diameter seal cover 201 and the stator core 500 will be described with reference to FIGS. 2, 3, and 9 to 11. First, referring again to FIG. 2 and FIG. 3, the stator core 500 has a plurality of divided stator cores 501 arranged in an annular shape, and the inner diameter seal cover 201 receives the front end portion in the radial direction of the divided stator core 501. A plurality of fitting holes 201a are provided at a predetermined interval pitch along the circumferential direction.

  As shown in FIG. 9, the split stator core 501 includes a laminated core 502 in which thin plates are laminated, an insulator 503 made of a resin member surrounding the laminated core 502, and a coil member 507 disposed outside the insulator 503. Have.

  The laminated core 502 has a fan-shaped base portion 502a and a convex tooth portion 502b extending from the base portion 502a toward the tip. The insulator 503 includes a cylindrical portion 506 provided so as to surround the teeth portion 502b, and a flange portion 504 that projects outward from the end of the cylindrical portion 506 on the base portion 502a side.

  Next, with reference to FIG. 10 and FIG. 11, the abutting relationship between the fitting hole 201a provided in the inner diameter seal cover 201 and the tip of the cylindrical portion 506 will be described. As shown in FIG. 10, an inclined surface 201 t is provided on the opening end portion of the fitting hole 201 a provided in the inner diameter seal cover 201 on the side facing the tubular portion 506 of the insulator 503. An inclined surface 506t is also provided at the tip of the cylindrical portion 506.

  As shown in FIG. 11, the opening end of the fitting hole 201a is obtained by associating the inclined surface 506t provided at the tip of the cylindrical portion 506 with the inclined surface 201t provided at the opening end of the fitting hole 201a. There is no gap between the portion and the cylindrical portion 506. Thereby, the sealing property in this abutting area | region can be improved, and it can prevent that cooling oil leaks out from a abutting area | region. Further, the split stator core 501 can be easily positioned with high accuracy with respect to the fitting hole 201a provided in the inner diameter seal cover 201.

  Further, since the laminated core 502 has a structure in which plates are stacked, a dimensional error in the stacking direction is likely to occur. Thus, by covering the laminated core 502 with a pre-formed insulator 503 in close contact, the gap between the plates of the laminated core 502 is eliminated and the occurrence of a gap between the fitting hole 201a is avoided in advance. Is possible.

  In consideration of the ease of positioning to the fitting hole 201a provided in the inner diameter seal cover 201, the fitting hole 201a and the inclined surfaces 201t and 506t of the cylindrical portion 506 are not provided, and the distal end portion of the cylindrical portion 506 is not provided. The configuration may be acceptable in the fitting hole 201a. In this case, it is preferable that the inner circumferential surface of the fitting hole 201a and the outer surface of the distal end portion of the tubular portion 506 have a dimensional relationship that substantially contacts.

(Detailed structure of the first engagement region F1 and the second engagement region F2)
Next, with reference to FIG. 12, the detailed structure of the 1st engagement area | region F1 and the 2nd engagement area | region F2 is demonstrated. In addition, in FIG. 12, the cross section of the structure of the 1st engagement area | region F1 and the 2nd engagement area | region F2 which are provided in the 1st coil end cover 300 side is illustrated. Since the basic structure of the first engagement region F1 and the second engagement region F2 provided in the second coil end cover 400 is also the same, here, the first engagement region F1 provided on the first coil end cover 300 side is the same. Only the structure of the first engagement region F1 and the second engagement region F2 will be described.

(First engagement region F1)
A plurality of first engagement regions F <b> 1 for locking the first coil end cover 300 to the outer cover 100 are provided in the abutting portion between the first coil end cover 300 and the outer cover 100 in the circumferential direction. . An outer engagement having a flange portion 110 that expands outward in the radial direction and an outer engagement wall 120 that rises in parallel to the outer cover 100 from the end portion of the flange portion 110 at the end portion of the outer cover 100. A region 130 is provided. A plurality of outer engagement regions 130 are provided on the circumference of the outer cover 100.

  The first coil end cover 300 has an outer drooping wall 301. The outer drooping wall 301 includes a flange portion 303 protruding outward from a middle region of the outer drooping wall 301, and an end portion of the flange portion 303. An inner engagement region 305 having an inner engagement wall 304 standing in parallel to the outer hanging wall 301 is provided.

  The inner engagement wall 304 provided in the inner engagement region 305 has a shape along the inner surface of the outer engagement wall 120 provided in the outer engagement region 130. Further, the outer engagement wall 120 is provided with an engagement hole 120a, and the outer surface of the inner engagement wall 304 is provided with a wedge-shaped engagement claw 304a. The engagement claw 304 a of the inner engagement wall 304 is engaged with the engagement hole 120 a of the outer engagement wall 120, so that the inner engagement region 305 is fixed to the outer engagement region 130.

  Further, the end portion of the outer drooping wall 301 is provided so as to reach the inner surface of the outer cover 100 on the entire circumference, and the outer surface of the outer drooping wall 301 and the inner surface of the outer cover 100 at the end portion of the outer drooping wall 301 are provided. In order to improve the sealing performance, a sealing member 350 such as an O-ring is provided over the entire circumference between the outer surface of the outer hanging wall 301 and the inner surface of the outer cover 100.

(Second engagement region F2)
At the abutting portion between the first coil end cover 300 and the inner cover 200, there is a second engagement region F <b> 2 that accommodates the convex portion provided on the inner cover 200 in the concave portion provided on the first coil end cover 300. It is provided in the circumference.

  The first coil end cover 300 has a first inner hanging wall 306, and further has a second inner hanging wall 307 inside the first inner hanging wall 306. A recess 308 is defined in a gap provided between the first inner hanging wall 306 and the second inner hanging wall 307.

  The end portion of the inner cover 200 is provided with a convex wall 220 in which the inner cover 200 extends as it is from a position retracted by the thickness of the first inner hanging wall 306. The convex wall 220 is accommodated in the concave 308, so that a labyrinth structure is formed and liquid tightness can be improved.

  Note that, at the end of the first inner hanging wall 306, the outer surface of the protruding wall 220 and the first inner hanging wall are used to improve the sealing performance between the outer surface of the protruding wall 220 and the inner surface of the first inner hanging wall 306. A seal member 360 such as an O-ring is interposed between the 306 and the entire circumference.

  In the second engagement region F2, the hanging wall has a double structure in order to define the recess 308 on the first coil end cover 300 side, but the end of the inner cover 200 has a double structure. And the first inner hanging wall 306 of the inner cover 200 may be accommodated in the recess. In this case, the formation of the second inner hanging wall 307 is not necessarily required. However, by providing the second inner hanging wall 307, the labyrinth structure can be further strengthened and the sealing performance can be improved.

  As described above, according to the stator based on the present embodiment, the joint member 210 is disposed on the joint end surface in the circumferential direction of the inner diameter seal cover 201, thereby assembling the inner diameter seal cover 201 without impairing the sealing performance. The improvement of the nature is aimed at.

  Further, the inner diameter seal cover 201 is provided with a fitting hole 201a for receiving the radially inner tip of the split stator core 501 along the circumferential direction, so that the stator core 500 can be easily positioned with respect to the inner diameter seal cover 201. It is said. Further, by adopting the insulator 503, it is possible to absorb a dimensional error generated in the laminated core 502.

  In addition, inclined surfaces 201t and 506t are provided at the opening end portion of the fitting hole 201a provided in the inner diameter seal cover 201 and the end portion of the tubular portion 506 of the insulator 503, respectively, and the inclined surfaces are abutted with each other. Thus, the generation of a gap at the butting portion is avoided to improve the sealing performance.

  In addition, the first engagement region F <b> 1 described above is provided at the abutting portion between the end of the outer cover 100, the end of the first coil end cover 300, and the end of the second coil end cover 400. The above-described second engagement region F <b> 2 is provided at a portion where the end portion abuts the end portion of the first coil end cover 300 and the end portion of the second coil end cover 400. Thereby, the end of the first coil end cover 300 and the assemblability of the second coil end cover 400 are improved without impairing the sealing performance.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Stator, 100 Outer cover, 110 Flange part, 120 Outer engagement wall, 120a Engagement hole, 130 Outer engagement area, 200 Inner cover, 201 Inner diameter seal cover, 201a Fitting hole, 201b Recess, 201t, 506t Inclined surface , 210 seaming member, 211 body part, 212 convex part, 220 convex part wall, 300 first coil end cover, 301 outer hanging wall, 303 flange part, 304 inner engagement wall, 304a engagement claw, 305 inner engagement 306, first inner hanging wall, 307 second inner hanging wall, 308 recess, 350, 360 sealing member, 400 second coil end cover, 500 stator core, 501 split stator core, 502 laminated core, 502a base portion, 502b teeth portion 503 Insulator 504 Hula 506, cylindrical portion, 507 coil member, 600 rotor, A1 central axis, F1 first engagement region, F2 second engagement region, R cooling oil supply space, S clearance, S1 cooling oil supply port, S2 cooling Oil outlet.

Claims (11)

An annular stator core;
An annular outer cover disposed on the outer peripheral surface side of the stator core;
An annular inner cover disposed on the inner peripheral surface side of the stator core;
An annular first coil end cover that closes an open portion formed by the outer cover and the inner cover on one end side in the central axis direction of the stator core;
An annular second coil end cover that closes an open portion formed by the outer cover and the inner cover on the other end side in the central axis direction of the stator core;
The inner cover is
An inner diameter seal cover that is in close contact with the inner peripheral surface of the stator core and surrounded by the stator core;
A stator in which a seaming member is disposed on a circumferential seam end face of the inner diameter seal cover. The stator core has a plurality of divided stator cores arranged in an annular shape,
2. The stator according to claim 1, wherein the inner diameter seal cover is provided with a fitting hole that receives a distal end portion on an inner side in a radial direction of the divided stator core along a circumferential direction. The divided stator core is
A laminated core in which plates are laminated;
A resin member surrounding the laminated core;
A coil member disposed outside the resin member;
The stator according to any one of claims 1 and 2.   The stator according to claim 3, wherein the resin member is an insulator that is resin-molded so as to have a cylindrical portion that surrounds the divided stator core. An opening end portion of the fitting hole provided in the inner diameter seal cover and an end portion of the tubular portion of the insulator are in contact with each other,
The stator according to claim 4, wherein the opening end portion of the fitting hole and the end portion of the tubular portion are provided with inclined surfaces that overlap each other. A convex portion is provided on a joint surface of the joint member with a joint end surface of the inner diameter seal cover,
On the end face of the inner diameter seal cover, a concave portion for receiving the convex portion is provided,
The stator according to claim 1, wherein a depth of the concave portion is provided deeper than a length of the convex portion.   The first coil end cover and the second coil end cover are connected to the end portion of the outer cover, the end portion of the first coil end cover, and the end portion of the second coil end cover. The stator according to any one of claims 1 to 6, wherein a plurality of first engagement regions for locking to the outer cover are provided.   At the end of the inner cover, the end of the first coil end cover, and the end of the second coil end cover, the protrusion provided on one of them is the other The stator according to any one of claims 1 to 7, wherein a second engagement region accommodated in the provided recess is provided on the entire circumference. When the central axis direction of the stator core is arranged in the horizontal direction,
The stator includes a refrigerant supply port for supplying a refrigerant to a refrigerant supply space closed by the first coil end cover and the second coil end cover, and a refrigerant discharge port for discharging the refrigerant from the refrigerant supply space. Above the central axis,
The stator according to any one of claims 1 to 8, wherein the splicing member is disposed so as to be positioned above a central axis. The stator has a refrigerant supply port for supplying a refrigerant to a refrigerant supply space closed by the first coil end cover and the second coil end cover, and a refrigerant discharge port for discharging the refrigerant from the refrigerant supply space. And
The stator according to any one of claims 1 to 8, wherein the splicing member is provided in a region substantially facing the refrigerant supply port with a central axis interposed therebetween.   The stator according to claim 10, wherein a central axis direction of the stator core is arranged in a horizontal direction.

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